That looks pretty sweet, but it seems like you're wasting a lot of space at the top. Is that full-body 3D model of you character at the bottom an addon or is it just part of your viewport background?
I know it takes up a lot of space but I don't think the textures would work with just the bottom, it'd look strange, plus i've managed to fit my party frames, damage meters, threat meters, minimap and eavesdrop up there. Don't really know where I'd put the minimap if I removed it.
The 3D model is Zuaxana's and displays the model of the target.
My UI hasn't changed radically in the past few months, but I'm planning on acquiring a brand shiny new monitor pretty soon which should lead to a new design in the near future. Here's a fond farewell to my boxes, hehe.
For those who care, the two frames on the right are hidden normally except for the Omen frame which displays when grouped and in combat thanks to OnScreen. I also have ClassTimers growing upwards from the top of the player and target unitframes, Parrot displaying in a MSBT-based style (incoming damage on the left, cooldowns and debuff warnings on the right, alerts at the top), and Quartz handling castbar/target castbar/swing/GCD.